At a light bulb factory, 3 out of every 1,000 bulbs produced are defective. if 5,000 bulbs are produced, how many would you expect to be defective?

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

I'm confused on this could anyone me and show me what i need to do to solve it.

Find the least common denominator for thesetvo rational expressions. n^2/n^2+4n+4 -3/n^2+7n+10